1 | #include <stdio.h> |
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2 | #include <sys/socket.h> |
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3 | #include <arpa/inet.h> |
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4 | #include <errno.h> |
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5 | #include <stdlib.h> |
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6 | #include <string.h> |
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7 | #include <fcntl.h> |
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8 | #include <signal.h> |
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9 | #include <unistd.h> |
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10 | #include <netinet/in.h> |
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11 | #include <time.h> |
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12 | |
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13 | void Die(char *mess) |
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14 | { |
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15 | perror(mess); |
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16 | exit(1); |
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17 | } |
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18 | |
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19 | int main(int argc, char *argv[]) |
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20 | { |
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21 | struct sockaddr_in recv_sockopt; |
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22 | int recv_sock; |
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23 | int recv_length = sizeof(recv_sockopt); |
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24 | int received; |
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25 | char BLACK_LIST[1024]; |
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26 | |
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27 | if (argc <= 1) |
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28 | { |
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29 | fprintf(stderr, "USAGE: %s <RECV_PORT>\n", argv[0]); |
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30 | fprintf(stderr, "Ex: %s 3838\n", argv[0]); |
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31 | exit(1); |
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32 | } |
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33 | |
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34 | /* Create the UDP socket to send response to icas_recv */ |
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35 | if ((recv_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
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36 | { |
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37 | Die("Failed to create socket for sending black list."); |
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38 | } |
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39 | |
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40 | /* Construct the server sockaddr_in structure */ |
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41 | memset(&recv_sockopt, 0, sizeof(recv_sockopt)); /* Clear struct */ |
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42 | memset(&BLACK_LIST, 0, sizeof(BLACK_LIST)); /* Clear string */ |
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43 | |
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44 | // socket option of icas_send socket |
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45 | recv_sockopt.sin_family = AF_INET; /* Internet/IP */ |
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46 | recv_sockopt.sin_addr.s_addr = htonl(INADDR_ANY); /* Any IP address */ |
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47 | recv_sockopt.sin_port = htons(atoi(argv[1])); /* server port */ |
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48 | |
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49 | /* Bind the socket */ |
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50 | if (bind(recv_sock, (struct sockaddr *) &recv_sockopt, recv_length) < 0) |
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51 | { |
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52 | Die("Failed to bind server socket"); |
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53 | } |
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54 | fprintf(stderr,"Finished binding port #%s for icas_recv socket.\n",argv[1]); |
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55 | |
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56 | while(1) |
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57 | { |
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58 | if ((received = recvfrom(recv_sock, BLACK_LIST, sizeof(BLACK_LIST), 0, |
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59 | (struct sockaddr *) &recv_sockopt, |
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60 | (socklen_t *) &recv_length)) < 0) |
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61 | { |
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62 | Die("Failed to receive message"); |
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63 | } |
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64 | fprintf(stderr,"Received: %s\n", BLACK_LIST); |
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65 | } |
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66 | |
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67 | close(recv_sock); |
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68 | exit(0); |
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69 | } |
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